<template>
  <!-- 角色管理 -->
  <div class="role_list">
    <div class="btns">
      <el-button type="primary" size="small" @click="toAdd">添加</el-button>
    </div>
    <el-table v-loading="loading" :data="roles" size="small">
      <el-table-column type="index" :index="1" label="序号" width="150" />
      <el-table-column prop="name" label="角色名称" />
      <el-table-column label="操作" align="center" width="180">
        <template slot-scope="scope">
          <a
            style="color: #008964"
            @click.prevent="deleteHandler(scope.row.id)"
          >移除</a>
          <a
            style="color: #008964"
            @click.prevent="toAuthorization(scope.row)"
          >授权</a>
          <a
            style="color: #008964"
            @click.prevent="toUpdate(scope.row)"
          >修改</a>
        </template>
      </el-table-column>
    </el-table>
    <!-- 模态框 -->
    <el-dialog :title="title" :visible.sync="visible">
      <el-form ref="role_form" :model="form" :rules="rules">
        <el-form-item label="角色名称" label-width="80px" prop="name">
          <el-input v-model="form.name" autocomplete="off" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button size="small" @click="visible = false">取 消</el-button>
        <el-button
          type="primary"
          size="small"
          @click="saveRoleHandler"
        >确 定</el-button>
      </div>
    </el-dialog>
    <!-- /模态框 -->
    <!-- 授权模态框 -->
    <el-dialog title="授权" :visible.sync="authorization_visible" width="80%">
      <el-form :model="role">
        <!-- {{role}} -->
        <el-form-item label="角色名称" label-width="80px">
          {{ role.name }}
        </el-form-item>
        <el-form-item label="权限" label-width="80px">
          <el-cascader-panel
            v-model="role.privileges"
            :options="options"
            :props="props"
            clearable
          />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button
          size="small"
          @click="authorization_visible = false"
        >取 消</el-button>
        <el-button
          type="primary"
          size="small"
          @click="authorizationHandler"
        >确 定</el-button>
      </div>
    </el-dialog>
    <!-- /模态框 -->
  </div>
</template>
<script>
import request from '@/utils/request'
import qs from 'querystring'
export default {
  data() {
    return {
      form: {},
      loading: false,
      visible: false,
      authorization_visible: false,
      title: '添加角色',
      role: {}, // 当前角色
      roles: [], // 角色列表
      props: {
        multiple: true,
        value: 'id',
        label: 'name',
        emitPath: false,
        checkStrictly: true
      },
      options: [],
      rules: {
        name: [
          { required: true, message: '请输入角色名称', trigger: 'change' }
        ]
      }
    }
  },
  created() {
    // 加载角色
    this.loadRoles()
    // 加载权限
    this.loadPrivileges()
  },
  methods: {
    // 去修改
    toUpdate(row) {
      this.form = row
      this.visible = true
    },
    authorizationHandler() {
      request
        .request({
          url: '/role/authorization',
          method: 'post',
          headers: {
            'Content-Type': 'application/x-www-form-urlencoded'
          },
          data: qs.stringify(this.role)
        })
        .then((response) => {
          this.authorization_visible = false
          this.$message({ message: response.message, type: 'success' })
          this.loadRoles()
        })
    },
    saveRoleHandler() {
      this.$refs['role_form'].validate((valid) => {
        if (valid) {
          request
            .request({
              url: '/role/saveOrUpdate',
              method: 'post',
              headers: {
                'Content-Type': 'application/x-www-form-urlencoded'
              },
              data: qs.stringify(this.form)
            })
            .then((response) => {
              this.visible = false
              this.$message({ message: response.message, type: 'success' })
              this.loadRoles()
            })
        } else {
          return false
        }
      })
    },
    loadPrivileges() {
      this.loading = true
      request.get('/privilege/findPrivilegeTree').then((response) => {
        this.foo(response.data)
        this.options = response.data
        this.loading = false
      })
    },
    // 递归去除权限中的空children
    foo(privileges) {
      for (const p of privileges) {
        if (p.children && p.children.length === 0) {
          delete p.children
        } else {
          this.foo(p.children)
        }
      }
    },
    toAdd() {
      this.form = {}
      this.visible = true
    },
    loadRoles() {
      request.get('/role/cascadePrivilegeFindAll').then((response) => {
        // 将权限转换为id的数组
        response.data.forEach((item) => {
          item.privileges = item.privileges.map((p) => {
            return p.id
          })
        })
        this.roles = response.data
      })
    },
    deleteHandler(id) {
      this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        request.get('/role/deleteById?id=' + id).then((response) => {
          this.$message({ type: 'success', message: response.message })
          this.loadRoles()
        })
      })
    },
    toAuthorization(record) {
      this.role = record
      this.authorization_visible = true
    }
  }
}
</script>
